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Database management apparatus and query operation therefor, including processing plural database operation requests based on key range of hash code
Database management apparatus and query operation therefor, including processing plural database operation requests based on key range of hash code
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机译:数据库管理装置及其查询操作,包括基于哈希码的密钥范围处理多个数据库操作请求
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摘要
A database management system for executing database operations in parallel by a plurality of nodes and a query processing method for it are described. The database management system contains a decision management node for deciding a distribution node for retrieving information so as to analyze a query received from an application program, generate a processing procedure for processing the query, and execute the process and a join node for sorting, merging, and joining the information retrieved by the distribution node. When the query process is executed, the distribution node decided by the decision management node retrieves the information to be processed and the join node decided by the decision management node also obtains the result for the query from the retrieved information. The query result is outputted from an output node and transferred to the application program.
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